John b



tate-glatmt @frn JOHN B, TINKER, OF BUFFALQ, NEW YRK, ASSIGNOR TO HIMSELF AND J. L. BEAZAN, OF THE SAME PLACE.

Leffe-relatant No. 62,575,- Jemz met?. 5,' ist?.

'tnraovrnsitsu LOCK.

l T0 ALI.` WIIOM- IT MAY CONCERTI:

Bc it known that I, JOHN B. -TINII-ltyoflhc city' offBuialo, county ct' Erie, and State of New York assig`nor to myself und James Il. ITC-amm) have in i'en'iedauien' and iin .'o'ved Sash Look; andlI'do hereby declare that the following isa full, clear, and exact description thereof', reference boing had to' -tiie'aecompanying-draulingm making a part of this specification, in which Figure I is a front elevation of my improved sash lock, showing the samens being unlocked, and the sash in a condition to be moved.

Figure II is a sectional front' elevation, showing the sash lock as .being locked.

Figure III is an endelevation ofthe same.

Figure IV is a top view of the sume.

The nature of this invention consists, iirst,lin making a window-sash lock havingtwo stops, with cogs or teeth on one end, which mesh with corresponding cogs or teetlrmade in the ease, and standing upon an incline, so that the movement of' these stops upon the toothed incline in one-d'irection-vvill-throtv the opposite end of the stops against the window casing` in a manner to hold the sashf'jfrotrfmoving in eitllerdirection, and so that a slight movement oi' the stops upon the toothed incline in the opposite direction willinstantly unlock or release the sash, and allow it to move, whereby .the sash can be held securely at any place desired; second,.inV the application and use of a spring, connected with both stops in amanner and `for thev purpose of producing the outward movement of the stops, to press against the casing; third, in the combination of a projecting pin made on the stops with a groove made in the case, for the purpose of holding the stops in gear with the toothed incline.

Letters of like name and kind refer to like parts in each of the figures.

A and A represent two stops, which have a curved flange, a2, on the end, which comes in Contact with the window casing, so as to present a greater bearing surface. Cogs or teeth, b, are formed at the opposite end,A also in a curve, though in the opposite direct-ion, and in such manner that both curves, a2 ande, when extended, -form the periphery of a true circle. The teeth Z mesh with cogs or teeth c, formedupon the inside of the casing or frame C. These cogs or teeth c extend from nearly the middle ofthe casing, on an inclined plane, in oppoi site directions toward the window casing in such manner that when the teeth ofthe stops A A move thereon in one direction, the flanges a2 will approach the Window casing and lock the sash firmly, so as to prevent it fromv moving either up or down; and when moved in the opposite direction, they will recede from the Window casing, and unlock the sash. `It will be observed, upon examination, that the operation of these stops, as described, is equal to or resembles the movement upon an inclinedplane of Wheels, the periphery of which isequal to the periphery of a circle drawn through the flange a2' and 'co'gs-b. and of which these parts form sections. A coil spring, D, is interposed between both stops and Vattached thereto, as shown atr 621Fig. II, for the purpose of forcing them apart in a manner to cause the flanges t2 to approach (or press against) the window casing. A movement ofthe stops in the opposite direction, so as to release or unlock the sash, is p roduced by means ofthe slide E, which rests against projections or arms, b1, formed on the toothed ends ofthe stops, as shown in Fig. II. A knob or button, F, projecting from the front plate of the case of the lock, is connected to the slide E by means of a shank, which passes through a slot, g, made in the case, as shown in the drawings. Each stop is provided with a projecting pin, 7L, which moves in guide-grooves, shown by dotted lines k1 in Fig. I. These are fol* the purpose of keeping the eogs or teeth b and cl in gear during thc movements of the stops. The casing or frame of this lock encloses allthe operating parts, and when properly finished or silver-plated, presents a beautiful appearance. By slightly changing the shape of the casing the lock may be set into the sash so as to beV Hush with thc surface thereof.A By this means the stops are made to bear against the inner groove of the casing instead of the slat, and keep all marks made thereby (if any) out of sight.

-What I claim as my invention, and desire to secure by Letters Patent, is-

1. A sash lock having two stops, A A', with cogs or teeth, b, on one end, which mesh with corresiponding" cogs or teeth, c1, made in the case C, and standing upon an incline, constructed, arranged, and oper ting in the manner und for the purpose substantially as herein described.

2.. The combination and arrangement ofthe spring D with the stops A A, in the manner md for the pur* pose substantially as set forth.

3. The combination ofthe projecting pin 7L made on the stops A A with a groove, h1, Vade in the case, for the purpose substantially as described.

B. TINKER.

Witnesses:

J. L. BEAZAN, 

